Sewing machine



A. B. FOWLER March 2 1926.

SEWING MACHINE Original Filed y 21,

Patented Mar. 2, 192 5.

- nm'rsn STATES PATENT OFFICE.

ALFRED B. FOWLER, 011 BEVERLY, MASSACHUSETTS, ASSllGfNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATEBSON, NEW JERSEY,

NEW JERSEY.

A CORPORATION OF SEVING MACHINE.

Original application filed May 21,

To aid "iv/10mit may canoe 1%.

Be it known that I, ALFRED B. FOWLER, a citizen of the United States, residing at Beverly, in the county of Essex and tate of lrlassat ahusetts, have invented certain new and useful ln'iprovements in Sewing Machines; and 1 do hereby declare the following to be a full, clear, and exact description of the invention. such as will enable others skilled in the art to which it appertains to make and use the same' The present invention relates to sewing machines and more particularlyto channel flap closing devices for machines that are designed to sew together the soles and uppers of shoes.

Theprincipal object of the invention is to provide a novel and improved channel flap closing device which is capable of operating in such a manner as not to interfere with the feeding of the work or the proper drawing of the needle loop through the work. To this end, the features of the invention consist in certain constructions, arrangements and combinations of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art.

The several features of the invention will be clearly understood from the following description and accompanying drawing, in which the figure is a sectional elevation looking from the right and taken on a plane just to the right of the needle segment, of a shoe sewing machine embodying the features in their preferred form.

The sewing machine illustrated in the drawing may be and preferably is the same a the machine illustrated and described in applicants co-pending application, Serial No. 298,589, filed May 21, 1919, of which the present application constitutes a division. This machine, as illustrated, .is provided with a curved hook needle 2, a needle guide 3, a thread finger 4, a looper 5, a channe closing device 6, a back gage 8, and a back rest or hunter 10.

The needle is secured in the usual man ner to a needle segment 12 which is pivotally mounted on a shaft 14 and is actuated by a link 16 having one end pivotally connected at 18 with the needle'segment and its other 1819, Serial No. 288,589. Divided and this application filed September 25, 1920. Serial No. 412,652.

end pivotally connected with a'cam actuated lever 20.

The channel. flap closing device in the illustrated machine acts to yieldingly engage the work to close the channel during the latter part of the forward movement of the needle and is raised out of engagement with the work when the needle acts to draw the loop through the channel and is maintained in raised position during the feeding of the work so that the closing of the channel does not interfere with the proper drawing of the loop through the work or the feeding of the work. The channel flap closing device is formed on the forward end of a lever 21 secured to a stud 22 that is pivotally mounted in the frameof the machine. A. roll 24:

i mounted upon the rear end of the [lever and a torsion spring 26 coiled about the stud tends to turn the lever in a direction to. maintainthe roll 2 1: in engagement with a cam surface 28 formed on the under side of the link 16. Vith this construction, it will be apparent from an inspecton of the drawing, that during the latter part of the for ward movement of the needle, the cam surface permits the lever 21 to be turned by its spring in a direction to bring the channel flap closing device down upon the channel flap, and during the first part of the loop drawing movement of the needle, the cam surface 28 acts to turn the lever 21 in a direction to raise the channel flap closing device from the work and to maintain the device out of engagement with the work until the latter part of the forward movement of the needle. The work engaging movement of the channel flap closing device is limited by the engagement of a lug 30 on the forward arm of the lever 21 with an adjustable abutment screw 32 secured to the frame of the machine.

\Vhile it is preferred to employ the specific construction and arrangement of parts illustrated and described, it is to be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention The nature and scope of the present inwith the work, and means for yieldingly pressing the channel flap closing device against the work while the needle is in the work.

2. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle arranged to pass through the channel of a shoe sole beneath the channel flap, a channel flap closing device movable into and out of engagement with the work, means for yieldingly pressing the channel flap closing device against the work while the needle is in the work, and a stop for limiting the movement of the flap closing device towards the work.

3. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, means including an actuating lever and a connecting link for advancing and retracting the needle, a channel flap closing device, and means including a cam surface on the link for actuating the flap closing device. I

4:. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, means including a link and an actuating lever for advancing and retracting the needle, a channel flap closing device, a spring for moving the channel flap closing device into engagement with the work, and means including a cam surface on said link for moving the channel flap closing device out of engagement with the work.

5. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, means for advancing and retracting the needle including a link and an actuating lever, a channel flap closing device carried by one end of the lever, a roll carried by the other end of the lever, a spring for swinging the lever to move the channel iiap closing device into engagement with the work, and a camsuritace on said link adapted to cooperate with said roll to swing'the lever in a direction to move the channel flap closing device out of engagement with the work.

A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, means for actuating the needle comprising a needle carrier and a reciprocating member connected with the needle carrier, a channel flap closing device, and means including a cam surface on said reciprocating member for actuating the channel flap closing device.

ALFRED B. FOVLER. 

